Photovoltaic energy storage generating module based on Liapunov switch coupling extremum searching
A photovoltaic energy storage and photovoltaic battery technology, applied in photovoltaic power generation, photovoltaic modules, photovoltaic power stations, etc., can solve the problems of not being able to fully utilize the power supply potential of photovoltaic battery units, low charging efficiency, and reducing the energy utilization rate of photovoltaic battery units
Active Publication Date: 2015-08-12
STATE GRID CORP OF CHINA +1
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Since the photovoltaic cells of the existing photovoltaic lithium battery energy storage system are connected in series with anti-reverse protection diodes, and the photovoltaic cells are directly connected to charge the lithium-ion cells, the existence of the forward voltage drop causes the photovoltaic cells to The charging efficiency of the unit to the lithium-ion battery unit is low, which reduce
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[0047] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0048] References throughout this specification to "one embodiment," "an embodiment," "an example," or "an example" mean that a specific feature, structure, or characteristic described in connection with the embodiment or example is included in the In at least one embodiment of the invention. Thus, appearances of the phrases "in one embodiment," "in an embodiment," "an example," or "example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, particular features, structures or characteristics may be combined in any suitable combination and / or subcombination in one or more embodiments or examples. Furthermore, the drawings provided herein are for illustration purposes to one of ordinary skill in the art and the drawings are not necessarily drawn to scale.
[0049] The photovoltaic ...
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The invention discloses a photovoltaic energy storage generating module based on Lyapunov switch coupling extremum searching. The photovoltaic energy storage generating module comprises a photovoltaic battery unit interface, a photovoltaic battery voltage equalization unit, an SEPIC feed buck-boost conversion unit, a lithium ion battery unit interface, a switching unit and a main control unit, wherein the SEPIC feed buck-boost conversion unit is connected with the photovoltaic battery voltage equalization unit in series; the switching unit is connected with the SEPIC feed buck-boost conversion unit and a lithium ion battery unit; and the main control unit is connected with the switching unit and a 2-Lyapunov extremum searching MPPT control sub unit. The 2-Lyapunov extremum searching MPPT control sub unit comprises a front-stage photovoltaic voltage equalization Lyapunov extremum searching MPPT control sub unit used for carrying out extremum searching on the photovoltaic battery voltage equalization unit, and a rear-stage SEPIC feed buck-boost Lyapunov extremum searching MPPT control sub unit used for carrying out extremum searching on the SEPIC feed buck-boost conversion unit. The front-stage photovoltaic voltage equalization Lyapunov extremum searching MPPT control sub unit and the rear-stage SEPIC feed buck-boost Lyapunov extremum searching MPPT control sub unit carry out extremum searching alternately.
Description
technical field [0001] The invention belongs to the field of photovoltaic lithium batteries, in particular to a photovoltaic energy storage power generation module based on Lyapunov switch coupling extremum search. Background technique [0002] As a new type of energy, solar energy has attracted increasing attention, and photovoltaic power generation, one of its main applications, has a broad market prospect. However, the main disadvantage of solar energy is that the energy is unstable. It is not available during the day and at night, and the sunny day is strong and the cloudy day is weak. Usually, it is necessary to equip an energy storage battery to stabilize the influence of solar energy instability. Therefore, a photovoltaic energy storage power generation system emerges as the times require, which includes a photovoltaic cell for converting solar energy into electric energy and an energy storage battery for storing the electric energy generated by the photovoltaic cell....
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Login to view more IPC IPC(8): H02S40/30H02S40/38H02J7/00
CPCH02S10/00H02S40/00Y02E10/50Y02E70/30
Inventor 彭飞陈玉峰辜超朱文兵任敬国周加斌朱孟兆杜修明李杰王建朱庆东白德盟
Owner STATE GRID CORP OF CHINA
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